Electrical connection



Feb. 14, 1933. G. L. CHAMBERLAIN ELECTRICAL CONNECTION Filed Aug. 14, 1929 ZNVENTOR: GEORGE L. CHAMBERLAIN,

Patented Feb. 14, 1933 PATENT OFFICE.

GEORGE L. CHAMBERLAIN, OF CHICAGO, ILLINOIS ELECTRICAL CONNECTION Application filed August 14, 1929-. Serial No. 385,953.

This invention relates to electrical connections, and more particularly to means for effecting a permanent connection between two conducting'wires or cables, as by a spliced joint or the like, or effecting a permanent connection between a conductor and an instrument, such as a feed wire and a transformer or other appliance.

In making a spliced connection between the ends of two electrical cables the meeting end portions of the conducting wires are .usually' twisted together and soldered or otherwise securely fastened, after which a tubular member is sleeved over the spliced end portions of the two cable sections and sealed at its ends, said tubular member being composedof lead or metal alloy similar to the external casing of the cable and the space therein surrounding the cable joint being filled with an insulating compound. The

end portions of this tubular member or protective. sheath are usually secured to the ad-- jacent portions of the leaden covering of the cable sections by a wiped joint such as is ordinarily made in effecting the connection between two lead pipe sections. This method of attaching the tubular sheathing to the cable sections obviously requires considerable skill and is quite expensive 011 account of the present high cost of that class of labor.

Furthermore, this type of joint is better accomplished when the partsare disposed horizontally. So, too, it is dificult to apply the insulating compound, which 7 is usually poured into the tubular sheathing through a minute aperture in the side wall thereof, after the ends of the tube have been sealed, and the only vent for said tube being a small aperture in the side wall thereof similar to that through which the insulating compound is poured into the tube. Or else a slot is provided for the purpose in the tube. In either case, the said openings have to be sealed after the insulating compound is placed in the tube, and this naturally adds to the labor and expense.

The present invention has for its objects to avoid all the disadvantages above noted and to provide a simple and practical means for effecting the connection between the tubular sheathing and the cable covering, to facilitate placing the insulating compound within the tube, and to attain certain other advantages which will hereinafter more fully appear,

The invention consists in the novel structural elements, and in the method of applying and utilizing the same as will hereinafter be more fully described and set forthin the n appended claims.

In the accompanying drawing, forming part of this specification, r

Fig. 1 is a view partly in longitudinal sec tion and partly in side elevation, showing the several parts detached but arranged preparatory to effecting a spliced cable connection;

Fig. 2 is a longitudinal section through the finished connection;

F ig; 3 is a side elevation of the finished connection;

Fig. 4 is a view partly in elevation and partly in section, illustrating a modification of the invention; and

F 5 illustrates a further modification of the invention.

Referring now to the drawing, the nu merals 5 and 6 designate the meeting end por tions of. two electrical cables, whose conducting wires 7 and 8 (see Fig. I) are uncovered where they are to be spliced together, as at 9 (see Fig. 2)

Before the meeting end portions 7 and 8 of the conducting wires of the two cable sections 5 and 6 are joined together a section of tubing 10, preferably composed of lead, is slipped over one of the cable sections, for example, the section 5 as shown. This tubular member is of interior diameter somewhat larger than the diameter of the spliced'joint 9 and that of the lead covering of the cable. Alsosleeved on the cable section 5 is a bushing 11, preferably of lead or some material which may be soldered or sweated to the cable covering and the tubular member 10. Preferably, the opening of said bushing is ust a littlelarger than the diameter of the cable covering, and it is of an over all diameter to fit snugly within the bore of the tube 10, and, preferably', said bushing is tapered circumferenr but just suficiently to enter easily and a .seat in the end portion of said tube 10, which "y be reamed according to the taper Y, 1 bushing. It is further preferable to the outer end ortions of said and bushing-as at12 an 13, respectively g ll-Qt fiiil-the eni iioihonsfi and '8 of the-conv k wires have been spliced, as at 9, the 10 is sleeved e ally over the 'omt, as

Fig. 2,'wit oneof the in all Aiocated in the tubc,j and' a suitable. pac

'- 314 is forced in" between the bushing '11 an gating of the cable section 5. Solder ,lfi is ap lied w the end portions of the flbealndcbus and the adjacent-port on 'veringp thecablc 5.- Toaccomphsh cisrstbod on end and the h -we s "fpolderiafiminfiothe ct provided b the 'countersinl; end portions 12 and 13, 3" r. 5701!, tube and bushing.

'" if. ':;portiel zofztheitube l0hasbeen attached the cable the ,5 illwbmhihglllgwhich'hasbcen sleeved on 6g? detachedfrotilln the W i' ;,re yinserl'ed 1n e op- 1 andpi @tube ande'said end rtion attached tosaid ca e secfisfnrethe sealing and attaching of the weed-1110mm: thetubc 10 to the cable reflected, however, the insulatin com- H H a 16 is preferabl cured into e tube fihetlmnnpen en t ereof,leaving room just suficient toinsert bushing 11.

the vention is particularly well "adaptable to the connecting of two cable secflfeas itpis also-applicable toieficcting a s a ion between'a cable and le rical a pliance, an example of P an Fig.- 4 of the draw- In this modification the reference nu- .q an ordinary transformer th which extends the tube *..ivhicb latter the cable 19 coma r: ,interior'of the a?! anfi 1 i P $60011 e0. I 1. cache transformer, asthe case may In j p f lg'loniof the tullmlar eiterkxlsion j rjspl' an a u ing20,simi artot e ere- 1 f bushing 11, said tubular 18and bushing 20 being secured to j i fiififibl 19b) the body of solder 21. In a rc'oi this character the tubular extenm sionl8. mayor ma noti be filed with italfie unsnl'j atin'gcompoun 16, epen ingupon 0 diameter of the connection which is made hey cable 19 and the internal part of h r i Ihemwenti, as also applicable to a multi- Q pl g,cable connection. That is to say, two or Inflatables maybe connected through one tabs opshepth 2 2,the only difierence between that-the bushingl23 is provided with a .,.-u dmg plurahty of openings instead L and the other herein described structures 1,897,680 a I a of a single opening for the passage of the H several cables therethrou'gh. I Obviously, in addition to afiording strength and durability and neatness in pearance, the jointure effected according tor"; the present invention is alsowater-tight, it is capable of considerable modification than that hereinshown without in the least departing from the spirit and scope of the invention as defined by the 3' appended claims. The invention, therefore, is not limited to the specific construction and arrangement shown in the accompanying p I r wingu a Having thus described my invention, what ,1 I claim as new and desire to secure by ters Patent is: A I i '1. In an electrical connection, the combii j nation of a cable sactionya tubular externih connectormember,abashingfittedo i; F slidable onsaid cable section and v relatively tight fit in the end portion 1 tubular connector member, the W 1 T tions of said tubular connector bushinghbeing countersunk to provide an nular red ket aboutthe cable and a body 0 solder applied in said s pocket whereby to join said tubular mg member and bushing and secure them-to the adjacent circumferential portion of & i 5 cable section. 2. In an electrical connection, the combine. T 5 tion of a cable section, a tubular external cofinector member surrounding the cable tion in spaced relation thereto'thro a bushing fitted originally slidableonl cablehsection and inserted with tight fit in the end-gortion of said connector member, e outer end p said bushin receding from anemia iii cable section with hezmeti y retentive efiect. In testimony whereof I have signedny i name to this specification. Hi '1 GEORGE L. CHAMBERLAIN} 

